Manufacture of chlorin.



UNITED STATES PATENT OFFICE.

MANUFACTURE OF CHLORIN.

Specification of Letters Patent.

i-acented May 1, 1906.

Application filed February 27, 1906. Serial No. 247.611-

To (all whom, it may mime-rm Be it known that I, ADOLF CLEmr, a subject of the German Emperor, residing at Mannheim, Germany, have invented certain new and useful Improvements in the Manufacture of Chlorin, of which the following is a specification.

This invention has for its object the. manufacture of chlorin and of a phosphate soluble in a solution of citric acid and iscarriedoutin practice in the following manner. r

Phosphate.as, for instance Florida-Algier phospliate-bones, or the like are treated with hydrochloric acid, and the solution of phosphate is separated from the residue and any excess of hydrochloric acid is neutralized until a n'eci )itate begins to form at the surface. '.I iis solution of acid phosphoric acidsalt and metal chlorid is subjected to electrolysis.

Under the influence of the electric current chlorin is evolved at the anode, and at the cathode h dro en is evolved and a precipitate of piospiiate (Oa lI,P O,,) is termed. This preci )i'tate of phosphate is completely and readi y soluble in a two-per-cent. solution of citric acid. It is thus possible to obtain from the hydrochloric acid used chlorin as such and to convert the phosphate into a form in which it difl'ers advantageously from the raw phosphate owing to its solubility in citric-acid solution, and by its purity its value'abeve that of the raw phosphate is greatly enhanced.

It is obvious that the composition of the liquid to be electrolyzml may be ditl'crent from that hereinbefore stated For instance, this liquid may be obtained by mixing together a solution of acid calcium phosphate with chlorid of alcium, (or clilol'id oi magnesium or the like,) the electrolyzation of which yives the same result. The first mot e \of worlting is especially applicable where reater quantities of hydnmhloric acid can lie had at low cost and the second where. kthlorid of calcium or chlorid of magnesium can be obtained at low cost us by-productsor waste and where a solution of acid calcium phosphate, such as that obtained in the extraction of low-grade phosphates by treating the latter with dilute sulfuric acid, can be produced more cheaply than by treating, them with hydrochloric acid.

I claim The herein-described process of manufacturing chlorin and at the-same time phosphate soluble in a solution of citric acid which consists in first preparing a combined solution of acid plies )horic acid salt, and a chlorid and then subjecting the said combined solution to the action of an electric current, as and for the purpose set forth.

in testimony whereot' l have signed my name to this specification in the presence of two subscribing witnesses.-

ADOLI GlJlCMM. Witnesses:

H. W. HARRIS, Josnrn FEIST. 

